Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - I'm catching smack for deleted alternator

orange4boy · 07-10-2012, 02:12 AM

Been alt free since joining. It's what got me here.

Cars pull between 20-50 amps and more at 14.5 volts. Alternators are at best 45%* efficient which means you can double the watts they draw off the engine. ~ 580W (.77hp) to 1450W (1.95hp) . Add the belt drag too. This draw happens every second the motor is running. At idle it can more than double your fuel consumption. At highway speed a small car needs about 9 hp to cruise. One hp is 10% of that.

Tell them to do the math. Alt delete makes a big difference.

*newer ones may be better but I have not researched this yet. An efficient electric motor is an expensive piece of equipment.

07-10-2012, 02:12 AM	#6 (permalink)
orange4boy Master EcoModder Join Date: Aug 2008 Location: The Wet Coast, Kanuckistan. Posts: 1,275 The Golden Egg - '93 Toyota Previa DX 90 day: 31.91 mpg (US) Chewie - '03 Toyota Prius 90 day: 57 mpg (US) The Spaceship - '00 Honda Insight Thanks: 100 Thanked 306 Times in 178 Posts	Been alt free since joining. It's what got me here. Cars pull between 20-50 amps and more at 14.5 volts. Alternators are at best 45%* efficient which means you can double the watts they draw off the engine. ~ 580W (.77hp) to 1450W (1.95hp) . Add the belt drag too. This draw happens every second the motor is running. At idle it can more than double your fuel consumption. At highway speed a small car needs about 9 hp to cruise. One hp is 10% of that. Tell them to do the math. Alt delete makes a big difference. *newer ones may be better but I have not researched this yet. An efficient electric motor is an expensive piece of equipment. __________________ Vortex generators are old tech. My new and improved vortex alternators are unstoppable. "It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.